一周

yī zhōu qián wǒ diū le yī bǎ ruì shì jūn dāo

一周前我丢了一把瑞士军刀。

I lost a Swiss army knife a week ago.

tā yīn wèi xíng wéi bù duān bèi tíng xué yī zhōu

他因为行为不端被停学一周。

He is suspended from school for a week for bad conduct.